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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(65 0)364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 989 9600 FAX(510) 988 9673 <br /> alAnalytica <br /> l 819 Striker Avenue Suitt 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942, 5153942 1300 Sampled 03/03/98 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descnpt RW1 Received 03/04/98 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 03/16/98 <br /> Attention Christa Marting Lab Number_ 9803306-13 Reported 03f31198 <br /> iC Batch Number GC031698BTEX21 A - <br /> nstrument ID GCHP21 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas 1000 11000 <br /> Methyl t-Butyl Ether 50 420 <br /> Benzene 10 320 <br /> Toluene 10 1300 <br /> Ethyl Benzene 10 660 <br /> Xylenes (Total) 10 1700 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits % % Recover <br /> Trifluorotoluene 70 130 105 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> FEQUOIA ANALYTICAL ELAP #1210 <br /> and H ling <br /> rect <br /> Manager Pae 8 <br /> 9 <br />